During the 70s and 80s, many bold claims were made about rates of deforestation in the Amazon, but few had were based on rigorous scientific data. In the 80s, NASA research scientist Dr. Compton J. Tucker began using satellite data to measure deforestation in Amazonia and calculate its rate. In this lecture, Tucker, explains the process he used and explains the results and their implications. This is part of the Walter Orr Roberts Public Lecture Series. Recorded on July 13, 1995 at the Aspen Global Change Institute.Â Visit AGCI online at www.agci.org.